Started implementing variable templates. Top level declarations should be fully supported, up to some limitations documented as FIXMEs or TODO. Static data member templates work very partially. Static data member templates of class templates need particular attention...
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187762 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclTemplate.cpp b/lib/AST/DeclTemplate.cpp
index ac0d54f..555800a 100644
--- a/lib/AST/DeclTemplate.cpp
+++ b/lib/AST/DeclTemplate.cpp
@@ -958,3 +958,248 @@
return new (Mem) ClassScopeFunctionSpecializationDecl(0, SourceLocation(), 0,
false, TemplateArgumentListInfo());
}
+
+//===----------------------------------------------------------------------===//
+// VarTemplateDecl Implementation
+//===----------------------------------------------------------------------===//
+
+void VarTemplateDecl::DeallocateCommon(void *Ptr) {
+ static_cast<Common *>(Ptr)->~Common();
+}
+
+VarTemplateDecl *VarTemplateDecl::Create(ASTContext &C, DeclContext *DC,
+ SourceLocation L, DeclarationName Name,
+ TemplateParameterList *Params,
+ NamedDecl *Decl,
+ VarTemplateDecl *PrevDecl) {
+ VarTemplateDecl *New = new (C) VarTemplateDecl(DC, L, Name, Params, Decl);
+ New->setPreviousDeclaration(PrevDecl);
+ return New;
+}
+
+VarTemplateDecl *VarTemplateDecl::CreateDeserialized(ASTContext &C,
+ unsigned ID) {
+ void *Mem = AllocateDeserializedDecl(C, ID, sizeof(VarTemplateDecl));
+ return new (Mem) VarTemplateDecl(EmptyShell());
+}
+
+// FIXME: Should this be unified accross class, function and variable
+// templates? Perhaps also moved to RedeclarableTemplateDecl?
+void VarTemplateDecl::LoadLazySpecializations() const {
+ Common *CommonPtr = getCommonPtr();
+ if (CommonPtr->LazySpecializations) {
+ ASTContext &Context = getASTContext();
+ uint32_t *Specs = CommonPtr->LazySpecializations;
+ CommonPtr->LazySpecializations = 0;
+ for (uint32_t I = 0, N = *Specs++; I != N; ++I)
+ (void)Context.getExternalSource()->GetExternalDecl(Specs[I]);
+ }
+}
+
+llvm::FoldingSetVector<VarTemplateSpecializationDecl> &
+VarTemplateDecl::getSpecializations() const {
+ LoadLazySpecializations();
+ return getCommonPtr()->Specializations;
+}
+
+llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl> &
+VarTemplateDecl::getPartialSpecializations() {
+ LoadLazySpecializations();
+ return getCommonPtr()->PartialSpecializations;
+}
+
+RedeclarableTemplateDecl::CommonBase *
+VarTemplateDecl::newCommon(ASTContext &C) const {
+ Common *CommonPtr = new (C) Common;
+ C.AddDeallocation(DeallocateCommon, CommonPtr);
+ return CommonPtr;
+}
+
+VarTemplateSpecializationDecl *
+VarTemplateDecl::findSpecialization(const TemplateArgument *Args,
+ unsigned NumArgs, void *&InsertPos) {
+ return findSpecializationImpl(getSpecializations(), Args, NumArgs, InsertPos);
+}
+
+void VarTemplateDecl::AddSpecialization(VarTemplateSpecializationDecl *D,
+ void *InsertPos) {
+ if (InsertPos)
+ getSpecializations().InsertNode(D, InsertPos);
+ else {
+ VarTemplateSpecializationDecl *Existing =
+ getSpecializations().GetOrInsertNode(D);
+ (void)Existing;
+ assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
+ }
+ if (ASTMutationListener *L = getASTMutationListener())
+ L->AddedCXXTemplateSpecialization(this, D);
+}
+
+VarTemplatePartialSpecializationDecl *
+VarTemplateDecl::findPartialSpecialization(const TemplateArgument *Args,
+ unsigned NumArgs, void *&InsertPos) {
+ return findSpecializationImpl(getPartialSpecializations(), Args, NumArgs,
+ InsertPos);
+}
+
+void VarTemplateDecl::AddPartialSpecialization(
+ VarTemplatePartialSpecializationDecl *D, void *InsertPos) {
+ if (InsertPos)
+ getPartialSpecializations().InsertNode(D, InsertPos);
+ else {
+ VarTemplatePartialSpecializationDecl *Existing =
+ getPartialSpecializations().GetOrInsertNode(D);
+ (void)Existing;
+ assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
+ }
+
+ if (ASTMutationListener *L = getASTMutationListener())
+ L->AddedCXXTemplateSpecialization(this, D);
+}
+
+void VarTemplateDecl::getPartialSpecializations(
+ SmallVectorImpl<VarTemplatePartialSpecializationDecl *> &PS) {
+ llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl> &PartialSpecs =
+ getPartialSpecializations();
+ PS.clear();
+ PS.resize(PartialSpecs.size());
+ for (llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl>::iterator
+ P = PartialSpecs.begin(),
+ PEnd = PartialSpecs.end();
+ P != PEnd; ++P) {
+ assert(!PS[P->getSequenceNumber()]);
+ PS[P->getSequenceNumber()] = P->getMostRecentDecl();
+ }
+}
+
+VarTemplatePartialSpecializationDecl *
+VarTemplateDecl::findPartialSpecInstantiatedFromMember(
+ VarTemplatePartialSpecializationDecl *D) {
+ Decl *DCanon = D->getCanonicalDecl();
+ for (llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl>::iterator
+ P = getPartialSpecializations().begin(),
+ PEnd = getPartialSpecializations().end();
+ P != PEnd; ++P) {
+ if (P->getInstantiatedFromMember()->getCanonicalDecl() == DCanon)
+ return P->getMostRecentDecl();
+ }
+
+ return 0;
+}
+
+//===----------------------------------------------------------------------===//
+// VarTemplateSpecializationDecl Implementation
+//===----------------------------------------------------------------------===//
+VarTemplateSpecializationDecl::VarTemplateSpecializationDecl(
+ ASTContext &Context, Kind DK, DeclContext *DC, SourceLocation StartLoc,
+ SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T,
+ TypeSourceInfo *TInfo, StorageClass S, const TemplateArgument *Args,
+ unsigned NumArgs)
+ : VarDecl(DK, DC, StartLoc, IdLoc, SpecializedTemplate->getIdentifier(), T,
+ TInfo, S),
+ SpecializedTemplate(SpecializedTemplate), ExplicitInfo(0),
+ TemplateArgs(TemplateArgumentList::CreateCopy(Context, Args, NumArgs)),
+ SpecializationKind(TSK_Undeclared) {}
+
+VarTemplateSpecializationDecl::VarTemplateSpecializationDecl(Kind DK)
+ : VarDecl(DK, 0, SourceLocation(), SourceLocation(), 0, QualType(), 0,
+ SC_None),
+ ExplicitInfo(0), SpecializationKind(TSK_Undeclared) {}
+
+VarTemplateSpecializationDecl *VarTemplateSpecializationDecl::Create(
+ ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
+ SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T,
+ TypeSourceInfo *TInfo, StorageClass S, const TemplateArgument *Args,
+ unsigned NumArgs) {
+ VarTemplateSpecializationDecl *Result = new (Context)
+ VarTemplateSpecializationDecl(Context, VarTemplateSpecialization, DC,
+ StartLoc, IdLoc, SpecializedTemplate, T,
+ TInfo, S, Args, NumArgs);
+ return Result;
+}
+
+VarTemplateSpecializationDecl *
+VarTemplateSpecializationDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
+ void *Mem =
+ AllocateDeserializedDecl(C, ID, sizeof(VarTemplateSpecializationDecl));
+ VarTemplateSpecializationDecl *Result =
+ new (Mem) VarTemplateSpecializationDecl(VarTemplateSpecialization);
+ return Result;
+}
+
+void VarTemplateSpecializationDecl::getNameForDiagnostic(
+ raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
+ NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
+
+ const TemplateArgumentList &TemplateArgs = getTemplateArgs();
+ TemplateSpecializationType::PrintTemplateArgumentList(
+ OS, TemplateArgs.data(), TemplateArgs.size(), Policy);
+}
+
+VarTemplateDecl *VarTemplateSpecializationDecl::getSpecializedTemplate() const {
+ if (SpecializedPartialSpecialization *PartialSpec =
+ SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization *>())
+ return PartialSpec->PartialSpecialization->getSpecializedTemplate();
+ return SpecializedTemplate.get<VarTemplateDecl *>();
+}
+
+void VarTemplateSpecializationDecl::setTemplateArgsInfo(
+ const TemplateArgumentListInfo &ArgsInfo) {
+ unsigned N = ArgsInfo.size();
+ TemplateArgsInfo.setLAngleLoc(ArgsInfo.getLAngleLoc());
+ TemplateArgsInfo.setRAngleLoc(ArgsInfo.getRAngleLoc());
+ for (unsigned I = 0; I != N; ++I)
+ TemplateArgsInfo.addArgument(ArgsInfo[I]);
+}
+
+//===----------------------------------------------------------------------===//
+// VarTemplatePartialSpecializationDecl Implementation
+//===----------------------------------------------------------------------===//
+void VarTemplatePartialSpecializationDecl::anchor() {}
+
+VarTemplatePartialSpecializationDecl::VarTemplatePartialSpecializationDecl(
+ ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
+ SourceLocation IdLoc, TemplateParameterList *Params,
+ VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo,
+ StorageClass S, const TemplateArgument *Args, unsigned NumArgs,
+ TemplateArgumentLoc *ArgInfos, unsigned NumArgInfos,
+ unsigned SequenceNumber)
+ : VarTemplateSpecializationDecl(Context, VarTemplatePartialSpecialization,
+ DC, StartLoc, IdLoc, SpecializedTemplate, T,
+ TInfo, S, Args, NumArgs),
+ TemplateParams(Params), ArgsAsWritten(ArgInfos),
+ NumArgsAsWritten(NumArgInfos), SequenceNumber(SequenceNumber),
+ InstantiatedFromMember(0, false) {
+ // TODO: The template parameters should be in DC by now. Verify.
+ // AdoptTemplateParameterList(Params, DC);
+}
+
+VarTemplatePartialSpecializationDecl *
+VarTemplatePartialSpecializationDecl::Create(
+ ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
+ SourceLocation IdLoc, TemplateParameterList *Params,
+ VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo,
+ StorageClass S, const TemplateArgument *Args, unsigned NumArgs,
+ const TemplateArgumentListInfo &ArgInfos, unsigned SequenceNumber) {
+ unsigned N = ArgInfos.size();
+ TemplateArgumentLoc *ClonedArgs = new (Context) TemplateArgumentLoc[N];
+ for (unsigned I = 0; I != N; ++I)
+ ClonedArgs[I] = ArgInfos[I];
+
+ VarTemplatePartialSpecializationDecl *Result =
+ new (Context) VarTemplatePartialSpecializationDecl(
+ Context, DC, StartLoc, IdLoc, Params, SpecializedTemplate, T, TInfo,
+ S, Args, NumArgs, ClonedArgs, N, SequenceNumber);
+ Result->setSpecializationKind(TSK_ExplicitSpecialization);
+ return Result;
+}
+
+VarTemplatePartialSpecializationDecl *
+VarTemplatePartialSpecializationDecl::CreateDeserialized(ASTContext &C,
+ unsigned ID) {
+ void *Mem = AllocateDeserializedDecl(
+ C, ID, sizeof(VarTemplatePartialSpecializationDecl));
+ VarTemplatePartialSpecializationDecl *Result =
+ new (Mem) VarTemplatePartialSpecializationDecl();
+ return Result;
+}